Protective colors, such as gray and grayish white, are mainly used above the waterline. And some little marine camouflage. The deck is mainly gray and green, because the anti-skid material used is gray or green. While considering the protective color, we should also consider salt prevention, rust prevention, waterproof and reflective.

Everything below the waterline is scarlet. This part of the hull below the waterline has been immersed in the sea and is easily corroded by seawater. At the same time, shells and insects such as chisels and anemones growing in the sea attach to the bottom of the ship, which not only damages the hull, increases the weight of the ship, but also affects the speed. So the bottom of the ship is painted with paint containing copper oxide, mercury oxide and iron oxide. These toxic substances are all red, so the bottom of the ship is red.

Civil ships mainly consider salt prevention, rust prevention and waterproof. And some signs and decorative paintings.

Black hull, white building, that was a Victorian painting, and now some cruise ships also use this kind of painting. /kloc-Victorian paintings popular in Europe in the 0/9th century, red below the waterline, white above the waterline, black hull, white superstructures such as flying bridges and bulwarks, and yellow chimneys and masts. This is a painting of Titanic. This painting was used by the Royal Navy at that time. Personally, I feel that Victorian painting is more of a show-off and decoration, just as the British were obsessed with bearskin hats and lobster suits at that time, but it was of little use to ships. The British are very nostalgic.